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SAI International School
Class – VII

Subject – Chemistry
Topic – Matter and Chemical Formulae
Sub-Topic – Chemical Formula

HOME ASSIGNMENT

MCQs/Objective Questions:

Choose the correct option:

Q. Questions Mark Skill
No. s
1. The CaCO3 is the chemical formula of 1 R
a) Potassium oxide. b) Calcium oxide.
c) Calcium carbonate. d) Calcium bicarbonate
2. The chemical formula of ammonia is 1 U
a)CaO b) MgO c) CO2 d) NH3
3. Valency of carbon is 1 U
a) 1 b) 2 c) 3 d)4
4. The valency of Bicarbonate (HCO3 ) is 1 U
-
a)1 b) 2 c) 3 d) 4
5. Combining capacity of an atom is known as its 1 K
a)Valency b) Formula
c) Symbol d) Chemical equation
6. Short hand representation of chemical compound is 1 U
known as
a)Valency b) Formula.
c) Symbol. d) Chemical equation.
7. The number of each atoms of similar elements present 1 U
in chemical formula is represented by
a)Super script b) Subscript
c) Arrow mark d) None of these
8. Number of oxygen atoms present in Zn(OH)2 is 1 U
a)1 b)2 c) 3 d)4

9. Group of atoms carrying a net charge is called 1 K&U
a) Cation b) Anion c) Poly atomic ion d) None of these

10. Chemical symbol of gold is R

a)Cu b)Ag c) Au d)Pb

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